IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0481092
(2002-06-25)
|
국제출원번호 |
PCT//EP02/06983
(2003-12-17)
|
§371/§102 date |
20031217
(20031217)
|
국제공개번호 |
WO03//004893
(2003-01-16)
|
발명자
/ 주소 |
- Biermann, Eberhard
- Gierer, Georg
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
5 |
초록
▼
A shift element sub-assembly for a transmission having two axially adjacent shift elements (2, 3) that are located in a transmission housing (1). The discs of both shift elements (2, 3) lie axially adjacent in the interior of the disc carrier (4) and are separated from one another by a central parti
A shift element sub-assembly for a transmission having two axially adjacent shift elements (2, 3) that are located in a transmission housing (1). The discs of both shift elements (2, 3) lie axially adjacent in the interior of the disc carrier (4) and are separated from one another by a central partition (40) of the disc carrier (4). Each shift element (2, 3) has a piston (23, 33) and a closing pressure chamber (24, 34), and at least one resetting element (27, 37, 39) for resetting the piston. Additionally, each shift element (2, 3) has a secondary piston (26, 36), which acts on the discs of each shift element (2, 3) in opposition to a resetting force of the resetting element (27, 37, 39) of each shift element (2, 3), via the piston (23, 33) of each shift element (2, 3), and at least one resetting element (27, 37, 39) of the shift element sub-assembly is configured as a drain pressure chamber (27, 37) that can be hydraulically or pneumatically actuated.
대표청구항
▼
1. A shift element subassembly for a transmission with two axially adjacent shift elements (2, 3) which can be actuated hydraulically or pneumatically, and arranged in a transmission housing (1) with a common disc carrier (4) for accommodating external discs (20, 21) or internal discs of both shift
1. A shift element subassembly for a transmission with two axially adjacent shift elements (2, 3) which can be actuated hydraulically or pneumatically, and arranged in a transmission housing (1) with a common disc carrier (4) for accommodating external discs (20, 21) or internal discs of both shift elements (2, 3), whereby the discs of both shift elements (2, 3) a rearranged axially adjacent inside the disc carrier (4) and are separated from each other by a central partition (40) of the disc carrier (4), whereby each shift element (2, 3) has a piston(23, 33) and a closing pressure chamber (24, 34) for actuation, which are arranged on the side of the disk of the respective shift element (2, 3) facing away from the partition (40) in the region of the front faces (41, 43) of the disc carrier (4), wherein each shift element (2, 3) has at least one resetting element (27, 37, 39) for piston resetting which is arranged in the disc carrier (4) radially above the discs of the respective shift element (2, 3), wherein each shift element (2, 3) has an additional secondary piston (26, 36) that acts through the piston (23, 33) of the respective shift element (2, 3) against a resetting force of the resetting element (27, 37, 39) of the respective shift element (2, 3) on the discs of the respective shift element (2, 3), and wherein the resetting elements (27, 37, 39) operate independently of one another and at least one resetting element (27, 37, 39) of the shift element subassembly is constructed as a drain pressure chamber (27, 37).2. The shift element subassembly according to claim 1, wherein recesses (42, 44) are provided in a region of the front faces (41, 43) of the disc carrier (4) in a peripheral direction in which the resetting elements (27, 37, 39) allocated to the shift elements (2, 3) are arranged and into which the secondary pistons (26, 36) allocated to the shift elements (2, 3) open axially displaceably.3. The shift element subassembly according to claim 2, wherein an adjusting ring (21, 31) allocated to the respective shift element (2, 3) is provided in the region of the front faces (41, 43) of the disc carrier (4) on which the secondary piston (26, 36) of the respective shift element (2, 3) when the shift element (2, 3) is open, whereby the discs of this shift element (2, 3) moreover have a specified air play (22, 32).4. The shift element subassembly according to claim 2, wherein the disc carrier (4) can be pre-assembled with the discs of both shift elements (2, 3), the secondary pistons (26, 36) and the adjusting rings (21, 31) as a subassembly element, whereby the air plays of the respective discs can be adjusted over variously wide adjustment rings (21, 31).5. The shift element subassembly according to claim 2, wherein the shift elements (2, 3) are constructed as brakes, whereby their common disc carrier (4) is constructed as an external disc carrier and is connected by one of form-locking or force-locking with the transmission housing (1).6. A method for controlling the shift element subassembly for a transmission with two axially adjacent shift elements (2, 3) which can be actuated hydraulically or pneumatically and arranged in a transmission housing (1) with a common disc carrier (4) for accommodating external discs (20, 21) or internal discs of both shift elements (2, 3), whereby the discs of both shift elements (2, 3) are arranged axially adjacent inside the disc carrier (4) and are separated from each other by a central partition (40) of the disc carrier (4), whereby each shift elements (2, 3) has a piston (23, 33) and a closing pressure chamber (24, 34) for actuation which are arranged on the side of the disk of the respective shift element (2, 3) facing away from the partition (40) in the region of the front faces (41, 43) of the disc carrier (4), the method comprising the steps of:independently resetting each shift element (2, 3) by positioning at least one resetting element (27, 37, 39) for piston resetting arranged in the disc carrier (4) radially above the discs of the respective shift element (2, 3), providing each shift element (2, 3) with an additional secondary piston (26, 36) that acts through the piston (23, 33) of the respective shift element (2, 3) against a resetting force of the resetting element (27, 37, 39) of the respective shift element (2, 3) on the discs of the respective shift element (2, 3), and constructing at least one resetting element (27, 37, 39) of the shift element subassembly as a drain pressure chamber (27, 37), and actuating the drain pressure chamber (27, 37) with modulatable pressure according to at least one of a specific shift and temperature. 7. The method for controlling the shift element subassembly according claim 6, further comprising the step of:controlling the pressure reduction in the closing pressure chamber (24, 34) when opening the shift elements (2, 3) according to one of a specific shift and depending upon temperature. 8. The method for controlling the shift element subassembly according claim 6, further comprising the step of:controlling the closing pressure chamber (24, 34) and drain pressure chamber (27, 37) by pressure-modulation, as a differential pressure chamber upon at least one of closing and opening the respective shift element (2, 3) as a of a specific shift. 9. A shift element subassembly for a transmission comprising:a first and a second axially adjacent shift elements (2, 3) which can be actuated hydraulically or pneumatically, and arranged in a transmission housing (1) with a common disc carrier (4) for accommodating external discs (20, 21) or internal discs of both shift elements (2, 3), the discs of both shift elements (2, 3) are arranged axially adjacent inside the disc carrier (4) and are separated from each other by a central partition (40) of the disc carrier (4), said first and second shift elements (2, 3) further comprising: a first and a second piston (23, 33) and a closing pressure chamber (24, 34) for actuation of the respective shift element (2, 3), which are arranged on the side of the disk of the respective shift element (2, 3) facing away from the partition (40) in the region of the front faces (41, 43) of the disc carrier (4); a first resetting element (27) arranged in the disc carrier (4) radially above the discs of the first shift element (2, 3) for resetting the respective piston of the first shift element (2); a second resetting element (37) arranged in the disc carrier (4) radially above the discs of the second shift element (2, 3) for resetting the respective piston of the second shift element (3); a first secondary piston (26, 36) that acts through the first piston (23) of the first shift element (2, 3) against a resetting force of the first resetting element (27) on the discs of the first shift element (2), a second secondary piston (36) that acts through the second piston (33) of the second shift element (3) against a resetting force of the second resetting element (27) on the discs of the second shift element (3), and wherein the first and second resetting elements (27, 37, 39) operate independently of one another on their respective first and second shift elements (2, 3) and at least one of the first and second resetting elements (27, 37) is constructed as a drain pressure chamber (27, 37).
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